Sharp as a gallon of potatoes T-Shirt

Wait......potatoes aren't sharp. Huh? Isn't a gallon typically a unit of measurement for liquids? But potatoes aren't a liquid, right? No they are not. What does this shirt mean?? It means that whoever is wearing it is AWESOME and is not afraid to confuse the hell out of people. People will see you wearing this shirt and think 'man, that is a really stupid shirt'.....OR.....they will think 'who is that mysterious person? Is this person possibly from another dimension where potatoes ARE sharp and ARE measured in gallons? What an interesting dimension that must be! I am intrigued by this person......I must know this person and give him/her my money and valued possessions'. Hey, it could happen. But you won't know unless you buy this shirt.